The soup was ready at around 9pm last night... Fell asleep on the couch and only covered it and put it in the fridge at 7:30am this morning. There is no meat or anything, just vegetables, lentils and broth.

We often leave pure vegetable soup and other things (all vegan) out overnight, either so the pot can cool before putting it in the fridge or freezer or out of neglect of putting it away. Even though you used chicken broth, it should be fine. As my husband and I joke, "There's only one way to find out." (We're often the guinea pigs before letting our four-year-old and 15-month-old eat it. My very picky mother-in-law would instantly throw it away.)